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Combined graphometer and plummet clinometer, 1663.

Surveying

1663

Graphometer, British, 1851-1900

Surveying

1851-1900

Graphometer

Surveying

1710-1720

Graphometer, for surveying

Surveying

Spirit level graphometer, German, 1870-1876

Surveying

1870-1876

Azimuth variation, European 1601-1700

Surveying

1601-1700

Graphometer by Richer of Paris, late 19th century

Surveying

1871-1900
Graphometer by Joducus Deens of Belgium, 1682

Graphometer, Flemish, 1682

Surveying

1682